基于高频GPS数据探测地震波信号的研究

发布时间：2018-05-28 00:32

本文选题：高频GPS + 精密单点定位　；参考：《地学前缘》2017年03期

【摘要】：介绍了适合于处理高频GPS数据的精密单点定位(PPP)和单点测速(PVD)两种算法,并通过静态模拟实验对其估值精度进行评估。精密单点定位算法解算的动态NEU三维坐标分量RMS分别为4.2、4.7和7.3mm;单点测速算法得到的NEU三维速度分量RMS分别为2.2、1.8和4.3mm/s。针对2010年4月4日墨西哥Baja California MS7.2级地震,选取震中距为60km的观测台站。采用精密单点定位和单点测速算法,分别解算高频GPS观测站的位移和速度的时间序列,其结果与并址的强震仪加速度积分得到的位移和速度的时间序列相比具有较好的一致性。实验结果表明:高频GPS能够有效提取地震波信号,且在强震中不易受仪器倾斜等因素影响,不存在积分偏差,是监测地震等地壳运动的重要手段。两种算法在地震监测应用中各有特点,精密单点定位可获得观测台站的永久变形量,单点测速可实时探测到高精度的地震波信号。
[Abstract]:This paper introduces two algorithms of precise single point positioning (GPS) and single point velocimetry (PVD) which are suitable for processing high frequency GPS data. The estimation accuracy is evaluated by static simulation experiment. The dynamic NEU 3D coordinate component RMS is 4.24.7mm and 7.3mm respectively, and the NEU 3D velocity component RMS obtained by the single-point velocity measurement algorithm is 2.2mm / 1.8 and 4.3 mm / s, respectively. In view of the Mexico earthquake of M _ S Baja California MS7.2 on April 4, 2010, the observation station with epicentral distance of 60km was selected. The time series of displacement and velocity of high frequency GPS station are calculated by precise single point positioning and single point velocimetry, respectively. The results are in good agreement with the time series of displacement and velocity obtained by the acceleration integral of the strong seismograph at the same site. The experimental results show that high frequency GPS can effectively extract seismic wave signals and is not easily affected by the inclination of instruments in strong earthquakes and there is no integral deviation. It is an important means to monitor crustal movement such as earthquakes. The two algorithms have their own characteristics in the application of seismic monitoring. The permanent deformation of observation stations can be obtained by precise single point positioning, and high precision seismic signals can be detected in real time by single point velocimetry.
【作者单位】：中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室;中国科学院大学地球科学学院;
【基金】：国家重点研发计划项目(2016YFB0501900) 国家自然科学基金项目(41321063) 大地测量与地球动力学国家重点实验室基金项目(SKLGED2013-4-1-Z)
【分类号】：P228.4;P315.7

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